a的值不一直是0吗？为什么变了？
res = []
num = 10
a = 0
b = 1
for x in range(num):
res.append(a)
a, b = b, a + b
print a
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0/150
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res = []
num = 10
a = 0
b = 1
for x in range(num):
res.append(a)
a, b = b, a + b
print a
2020-10-06
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